Term
| What are sources of ventilating air in a combustion heater? |
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Definition
Cabin compressor, ram air and a blower
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Term
| What are three methods of supplying heat when "heat of compression" is not sufficient for cabin air conditioning? |
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Definition
Gas combustion heater, gas air-to-air heat exchanger and electric heater exhaust |
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Term
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Definition
| It's an engine-driven compressor, based on the intake of a pre-determined volume of air that is compressed and delivered to the cabin duct |
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Term
| What is the principal control of a pressurization system? |
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Definition
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Term
| What are the two groups of independent cabin compressors? |
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Definition
| Positive-displacement and centrifugal |
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Term
| What method is used by some turbine-powered aircraft for pressurization? |
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Definition
| Compressor section bleed air from a turbine-engine |
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Term
| What pressurization control unit will change the position of an outflow valve? |
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Definition
| The cabin pressure controller |
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Term
| What is the function of ventilating air in a combustion heater? |
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Definition
| It carry's the heat to the places where it is needed |
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Term
| What safety precautions should be observed when servicing oxygen systems? |
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Definition
Oil free tools, clothing
Hand and eye protection |
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Term
| Why is oil added to a vapor-cycle freon system? |
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Definition
| To provide lubrication and prevent compressor failure |
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Term
| What type of oxygen must be used in aircraft? |
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Definition
| Aviators' breathing oxygen |
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Term
| What is used to purge oxygen lines of moisture? |
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Definition
Dry nitrogen, dry air and oxygen
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Term
| What is a pressure-demand oxygen system? |
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Definition
| Oxygen flows from a charged cylinder on demand of the user |
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Term
| What components are in a vapor cycle cooling system? |
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Definition
Compressor, condenser
evaporator and expansion valve |
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Term
| How does a water separator remove moisture from the air? |
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Definition
| The air passes through vanes that swirl the air and the droplets are collected and drained |
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Term
| What components are used in air cycle cooling system? |
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Definition
Various valves, expansion turbine and air-to-air heat exchanger
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Term
| What causes a temperature drop in an air cycle cooling system? |
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Definition
| The compressed air performs the work of turning a turbine |
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Term
| What is vapor cycle cooling? |
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Definition
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Term
| What is a continuous-flow oxygen system? |
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Definition
| Oxygen will flow from a charged cylinder through a high-pressure line to a reducing valve and to mask outlets |
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Term
| What must be accomplished to an oxygen system if it has been open to atmosphere for 2 hours or more? |
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Definition
| It needs to be purged of moisture |
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